Which ligament of the hip joint prevents excessive adduction and is the strongest ligament in the human body?

Explanation

## Hip Joint Ligaments **Key Point:** The iliofemoral ligament (Y-ligament of Bigelow) is the strongest ligament in the human body and is crucial for hip stability. ### Structural Features - **Attachment:** Originates from the anterior inferior iliac spine and iliopubic eminence; inserts on the intertrochanteric line of the femur - **Shape:** Inverted Y configuration, hence the name "Y-ligament of Bigelow" - **Function:** Prevents excessive extension and external rotation of the hip; prevents excessive adduction - **Strength:** Strongest ligament in the body due to its thick, dense collagen fibers ### Other Hip Ligaments for Comparison | Ligament | Origin | Insertion | Primary Function | |----------|--------|-----------|------------------| | **Iliofemoral** | AIIS, iliopubic eminence | Intertrochanteric line | Prevents extension, adduction, external rotation | | **Pubofemoral** | Pubic bone | Medial aspect of femoral neck | Prevents abduction and external rotation | | **Ischiofemoral** | Ischial body | Greater trochanter | Prevents internal rotation and adduction | | **Ligamentum teres** | Acetabular notch | Fovea capitis femoris | Carries blood supply to femoral head | **High-Yield:** The iliofemoral ligament is frequently tested because of its superlative status (strongest ligament) and its clinical relevance in hip dislocation and osteoarthritis. **Clinical Pearl:** Tightness of the iliofemoral ligament contributes to hip flexion contractures, commonly seen in prolonged sitting or hip flexor tightness syndromes.